1 files changed, 17 insertions, 0 deletions
diff --git a/third_party/rust/tokio/src/util/error.rs b/third_party/rust/tokio/src/util/error.rs
new file mode 100644
index 0000000000..8f252c0c91
--- /dev/null
+++ b/third_party/rust/tokio/src/util/error.rs
@@ -0,0 +1,17 @@
+/// Error string explaining that the Tokio context hasn't been instantiated.
+pub(crate) const CONTEXT_MISSING_ERROR: &str =
+    "there is no reactor running, must be called from the context of a Tokio 1.x runtime";
+
+// some combinations of features might not use this
+#[allow(dead_code)]
+/// Error string explaining that the Tokio context is shutting down and cannot drive timers.
+pub(crate) const RUNTIME_SHUTTING_DOWN_ERROR: &str =
+    "A Tokio 1.x context was found, but it is being shutdown.";
+
+// some combinations of features might not use this
+#[allow(dead_code)]
+/// Error string explaining that the Tokio context is not available because the
+/// thread-local storing it has been destroyed. This usually only happens during
+/// destructors of other thread-locals.
+pub(crate) const THREAD_LOCAL_DESTROYED_ERROR: &str =
+    "The Tokio context thread-local variable has been destroyed.";